fix(tui): input stays in box during/after turn

- mark input bar turn-in-progress on submit
- re-enable input after turn resumes
- clear input area before redraw
- clear completion popup before redraw
- resume re-enters alternate screen and clears cleanly

This prevents typed text from overwriting itself and stops redraws from
spilling word-wrapped text outside the input box.

rust/crates/rusty-claude-cli/src/main.rs

@@ -7301,6 +7301,7 @@ fn run_tui_repl(mut cli: LiveCli) -> Result<(), Box<dyn std::error::Error>> {
                 let result = cli.run_turn_to(&trimmed, &mut buf, false);
                 drop(stdout);
                 app.resume()?;
+                app.set_turn_in_progress(false);
 
                 {
                     let messages = &cli.runtime.session().messages;

rust/crates/rusty-claude-cli/src/tui/app.rs

@@ -107,10 +107,14 @@ impl TuiApp {
 
     /// Resume TUI after suspend.
     pub fn resume(&mut self) -> Result<(), Box<dyn std::error::Error>> {
+        crossterm::execute!(
+            io::stdout(),
+            crossterm::terminal::EnterAlternateScreen,
+            Clear(ClearType::All),
+            crossterm::cursor::Hide
+        )?;
         enable_raw_mode()?;
-        let _ = crossterm::execute!(io::stdout(), Clear(ClearType::All), crossterm::cursor::MoveTo(0, 0));
         let _ = io::stdout().flush();
-        self.terminal.hide_cursor()?;
         self.terminal.clear()?;
         Ok(())
     }
@@ -226,6 +230,10 @@ impl TuiApp {
         self.keymap.set_preset(preset);
     }
 
+    pub fn set_turn_in_progress(&mut self, in_progress: bool) {
+        self.input_bar.set_turn_in_progress(in_progress);
+    }
+
     pub fn key_preset_name(&self) -> &'static str {
         match self.keymap.preset() {
             KeyPreset::Emacs => "Emacs",
@@ -284,6 +292,7 @@ impl TuiApp {
         match outcome {
             InputOutcome::Submit(text) => {
                 self.input_bar.push_history(&text);
+                self.set_turn_in_progress(true);
                 Ok(TuiReadOutcome::Submit(text))
             }
             InputOutcome::Cancel => Ok(TuiReadOutcome::Cancel),

rust/crates/rusty-claude-cli/src/tui/components/input_bar.rs

@@ -105,6 +105,7 @@ impl InputBar {
 
     pub fn set_turn_in_progress(&mut self, in_progress: bool) {
         self.turn_in_progress = in_progress;
+        self.dirty = true;
     }
 
     /// Push text to history.
@@ -293,23 +294,17 @@ impl InputBar {
             width: area.width.min(40),
             height: (matches.len() as u16 + 2).min(10),
         };
+        frame.render_widget(ratatui::widgets::Clear, popup);
         frame.render_widget(list, popup);
     }
 }
 
 impl Component for InputBar {
     fn render(&self, area: Rect, frame: &mut Frame, theme: &TuiTheme) {
+        frame.render_widget(ratatui::widgets::Clear, area);
         let widget = self.textarea.clone();
         frame.render_widget(&widget, area);
-
-        // Render completions popup above the input area
-        if self.showing_completions {
-            // Note: can't call self.render_completions() from &self here
-            // because we need mutable access to check state but render is &self.
-            // Workaround: render completions in the draw_frame function directly.
-            // This is acceptable for Phase 1 — will be refined later.
-            let _ = (area, frame, theme);
-        }
+        self.render_completions(area, frame, theme);
     }
 
     fn is_dirty(&self) -> bool {